21476571447613 has 2 divisors, whose sum is σ = 21476571447614. Its totient is φ = 21476571447612.

The previous prime is 21476571447601. The next prime is 21476571447623. The reversal of 21476571447613 is 31674417567412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21464068182489 + 12503265124 = 4632933^2 + 111818^2 .

It is a cyclic number.

It is not a de Polignac number, because 21476571447613 - 2⁹ = 21476571447101 is a prime.

It is a super-2 number, since 2×21476571447613² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21476571447623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10738285723806 + 10738285723807.

It is an arithmetic number, because the mean of its divisors is an integer number (10738285723807).

Almost surely, 2^{21476571447613} is an apocalyptic number.

It is an amenable number.

21476571447613 is a deficient number, since it is larger than the sum of its proper divisors (1).

21476571447613 is an equidigital number, since it uses as much as digits as its factorization.

21476571447613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23708160, while the sum is 58.

The spelling of 21476571447613 in words is "twenty-one trillion, four hundred seventy-six billion, five hundred seventy-one million, four hundred forty-seven thousand, six hundred thirteen".